System.Security.Util.StringExpressionSet.GetLongPathName C# (CSharp) Method

        internal static extern String GetLongPathName( String path );

 internal static string CanonicalizePath(string path, bool needFullPath)
 {
     if (needFullPath)
     {
         string text = Path.GetFullPathInternal(path);
         if (path.EndsWith(StringExpressionSet.m_directorySeparator.ToString() + ".", StringComparison.Ordinal))
         {
             if (text.EndsWith(StringExpressionSet.m_directorySeparator))
             {
                 text += ".";
             }
             else
             {
                 text = text + StringExpressionSet.m_directorySeparator.ToString() + ".";
             }
         }
         path = text;
     }
     else if (path.IndexOf('~') != -1)
     {
         string text2 = null;
         StringExpressionSet.GetLongPathName(path, JitHelpers.GetStringHandleOnStack(ref text2));
         path = ((text2 != null) ? text2 : path);
     }
     if (path.IndexOf(':', 2) != -1)
     {
         throw new NotSupportedException(Environment.GetResourceString("Argument_PathFormatNotSupported"));
     }
     return(path);
 }